#include <stdio.h>

#define LOWER 0
#define UPPER 300
#define STEP 20

int main()
{
    printf("Hello world\n");
    int fahr;
    for (fahr = 0; fahr <= UPPER; fahr += STEP)
        printf("%d, %6.1f\n", fahr, (5.0/9.0)*(fahr-32));
    return 0;
}

